Drilling-machine.



Patented Oct. 3, |899.

M. GANS.

DRILLING MACHINE.

(Appliemilm med .n.n. 14, 1899.)

WITNEEEEE INH/ENTER QogAq/ww QW-:ji l Am/wmf' XM aM/ @Y CAM/QM ATTDRNEY VNrrnD STA-TES ATENT Fries.

MOSES GANS, OF BALTIMORE, MARYLAND.

DRILLINe-MACHINE.

SPECIFICATION forming part of Letters Patent NO. 634,331, dated October 3, 1899.

Application filed January 14 l 8 99.

To L7/Z whom, it may concern: v

Be it known that I, MOSES GANS, a citizen of the United States, residing atv Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Drilling- Machines, of which the followingis a speciiication.

This invention relates to drilling-machines; and the object of theinvention is to construct a machine especially adapted for drilling holes in metal tubes such as are commonly used as umbrella-rods.

Another object of the invention is to so construct the drilling-machine that the tube to be drilled will be supported in the proper position while two drills, one on either side, are brought against the tube, and two holes are simultaneously bored, one being diametrically opposite the other. The construction and arrangement of the improved machine enable the drilling to be rapidly and accurately done.

The invention is illustrated in the accompanying drawings, in which Figure l is a plan View of the machine. Fig. 2 is a side elevation of the machine and also shows a counter-shaft from which power is transmitted by belts. Fig. 3 is a perspective view of a portion of an umbrella-rod and illustrates the holes, for boring which the machine is designed.

Referring now to the drawings, the letter A designates the base-plate or table, which in the present instance carries four vertically-projecting supports l), which latter at their top terminate in bearings h, and ,two

shafts c c are mounted in alinement and re-Y volve in the said bearings. Pulleys d d', over which belts are run to impart motion, are fixed to the shafts, and in the present instance each pnlleyis provided with a iianged collar e, the purpose of which will presently be pointed out. On the extreme outer end each shaft carries a collar g, having a' setscrew by which it may be adjusted on the shaft and which limits theinward movement of said shaft. The inner end of each shaft 'c c is provided with a chuck h 7L', and each 'chuck is to carry a drill-point. Horizontal guide-rods i t have position between the base-plate A and shafts, and said rods are rigidly secured to the supports b. The shafts Serial No. 702,122. (No model.)

and drill-chucks are moved endwise byshifters j j', each having a sleeve 7e, which is mounted on one of the guide-rods, and at the top each shifter is provided with prongs Z, which project upward and have position in the grooves of the collar c. AleverwJ is pivotally mounted at 'm' on the base-plate A, and at one end this lever is provided with a handle m2. This shifting-lever in the present instance is connected to the two shifters jj' by rods n n', and it will be seen that any movement of the shifting-lever will be communicated to the two Shifters. A guide or tube supporting block o, having a groove o', is mounted in a holderp, and said holder is supported in an elevated position above the base by a bracket q, which is secured to the base-plate by screws q'. The purpose of the groove o/ is to receive and support the tube u which is to be drilled. Set-screws r retain the block in the holder p. A screw s on the base or table A serves as a stop for the shifting-lever on and prevents the movement of said lever so far as to permit the two drills to contact with each other.

It will be seen by reference to Fig. 2 that one belt, in broken lines, from the countershaft is direct, while the other belt, also in broken lines, from the same shaft is crossed. The ob ject of crossing the latter belt and rotating the shaft c in an opposite direction from the other shaft c is to enable the use of right-hand drills in both chucks. Openings u u in the base-plate A permit the belts to pass over the pulleys d d on the shafts and the pulleys on the counter-shaft below.

The operation of the machine is obvious.

While I prefer to use the machine and have illustrated it in a horizontal position,with the counter or power-transmitting shaft directly underneath, it is 'obvious that the machine could be vertically located and the position of the counter shaft changed correspondingly.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a drilling-machine the combination of a base-plate; two shafts mounted in alinement with respect to each other to revolve and in the same plane with thebase-plate and each shaft carrying a chuck and drill;

IOO

means for imparting' a rotary motion to thc said two shafts; a shifting-lever mounted on the base-plate and connecting said two shafts for simultaneously moving the shafts, chucks and drills toward or away from each other, and an adjustable stop to prevent the drills from contacting with each other, for the purpose set forth.

2. In a drilling-machine the combination of a base-plate; two shafts mounted in alineinent with respect to each other to revolve above the base-plate-each shaft carrying a chuck and drill; means for imparting rotary motion to the said shafts; `grooved collars on and revolving with the shafts; two shifters each having one end taking` in the groove of each collar; a shifting-lever pivoted to the base-plate, and rods connecting` each shifter with the lever, substantially as described.

In a drilling-machine for drilling tubes the combination of a base-plate; two shafts mounted in alinement with respect to each other to revolve above the basc-plate-eaoh shaft carrying a chuck and drill; means for imparting rotary motion to the said shafts; g collars on and revolving` with said shafts; a shifting-lever mounted on the base-plate to move the two shafts cndwisc; means connecting the two collars with the shifting-lever, and a tube-supporting block mounted above the base-plate and between the two chucks and provided with a groove, o', to hold the tube in a position at right angles with respect to the two shafts, substantially as described.

4. In a drilling-machine the combination of a base-plate; two revoluble shafts mounted in alinement with respect to each other and each shaft carrying a chuck and drill; means for imparting rotary motion to the said shafts; collars on and revolving with the shafts; a fixed guide-rod having position between each shaft and base-plate and in the same plane with both; a shifter having a sleeve sliding on the said guide-rod and one end which connects with the collar; a shifting-lever; and connections from each shifter to the lever, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

MOSES GANS.

lVitnesses:

CHARLES 1S. MANN, Jr.,

mo. Kommun. 

